In the past few, I've used Intel, Foxconn, PC Chips, ECS, Gigabyte, Asus, MSI, and Jetway. They were all fairly recent boards, AM2 and LGA775 generation or newer.
The PC Chips AM2 board lasted a few years, till the capacitors swelled, but they replaced it free out of warranty. 2 of the Gigabyte boards (both AM2+) arrived with severe and reproducible stability issues, they were Newegg Open Box, so not that big of a surprise. Getting them replaced under warranty was a huge hassle, because first time for both boards, they were returned with "no problems found". I had to write very detailed instructions, send photos, and link to videos, in order to FINALLY get their technicians up to speed on how to reproduce the problem. Both boards were eventually finally returned to me properly repaired and working perfectly for years. I feel like that's pretty typical for Newegg Open Box - you are buying someone else's problem. Anytime I've paid full price to buy a Gigabyte board brand new, it never had any problems.
Overall, I prefer Asus and Gigabyte. Just from quality of the NB/SB heatsinks, hardware design, capacitors, and BIOS especially, I tend to prefer Gigabyte. Also the fact that there are much fewer of them being returned to Newegg than Asus, MSI, or Asrock makes me feel like there must be fewer duds out of the factory.